In the woolly wilds of Oregon, Spring has sprung! The sun is shining, bees are buzzing, and if your covered wagon turns over while fording the river, you might not die of hypothermia. (That was an Oregon Trail joke.) What better way to usher in the season and enjoy the outdoors than building your own stomp-bottle rocket launcher? Safe and easy, you can welcome back the songbirds with a barrage of air-propelled science! (Explosions Inc. does not condone firing rockets at living creatures. Not even birds. Not even if they totally pooped on you and your fancy new pants completely on purpose while you were minding your own business. Stupid birds.)